If the batteries are of the same type, i.e. both are NiMH or both are Lithium-ion, then you can use a higher capacity (i.e. higher mAh) battery instead of the lower one. The reverse is also true.
People visiting Table Rock are not allowed beyond the Mill Creek Watershed boundary, which is clearly marked with numerous signs. As mentioned earlier, the Mill Creek Watershed is a closed watershed and no public access is allowed, as it is the municipal water source for the city of Walla Walla, Washington.
Tough climb up but once there it is solid riding. The Chimney Rock Hawk Watch is often at the Overlook at White Rock in the fall. Fun downhill run from top to intersection as well as small but tough rock garden (named Rocky Bit) on the other side.